Diatrypella quercina, known as oak blackhead

Diatrypella quercina, known as oak blackhead, wild fungus growing on dead oak brances in Finland

AscomycotaDiatrypellaDiatrypella quercinaFinlandMarchXylarialesblackbranchcushion shapedfungifungusmushroommycologyoakoak blackheadoak branchquercinaroughspring